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STATES PATENT Trice.

HALE E. HAWK AND OLIVER Wr. JOHNSON, OF BUOYRUS, OHIO; SAID JOHN- SON ASSIGNOR TO SAID HAWK, OF ALLIANCE, OHIO.

STREET-SWEEPER.

SPECIFICATION forming part of Letters Patent No. 491,555, dated February 14, 1893.

Application led June 30, 1891. Serial No. 398,074. (No model.)

T0 all whom, it may concern:

Be it known that we, HALE E. HAWK and OLivnR W. JOHNSON, citizens of the United States, residing at Bucyrus, in the county of Crawford and State of Ohio, have invented a new and useful StreetSWeeper, of which the following is a specification.

This invention relates to improvements in street sweepers; and the objects in view are to provide a street sweeping machine of cheap and simple construction, adapted to automatically and thoroughly scrape, brush and elevate the refuse, to collect the same and at intervals deliver it.

A further object of the invention is to provide for an adjustment of the brushes and Scrapers, and also for the belt connections between the moving parts.

With the above objects in view the invention consists in certain features of construction hereinafter specified and particularly pointed out in the claims.

Referring to the drawingsz-Figure 1 is a vertical longitudinal section of a street sweeping machine constructed in accordance with our invention. Fig. 2 is a vertical transverse section on the line .fr-fc of Fig. 1. Fig. 3 is a horizontal section on the line y-y of Fig. l. Fig. 4 is a vertical section on the line .c-z of Fig. 1. Fig. 5 is a plan view. Fig. 6 is an enlarged detail of the lower portion of the machine, or what we term the brush-guide.

Like numerals of reference indicate like parts in all the figures of the drawings.

In practicing our invention we construct a framework of suitable shape and proportions, the same being adapted to carry the mechanism hereinafter described. In this instance the framework comprises a pair of side-bars 1, connected at intervals by suitable cross bars and having bolted thereto at the front end thereof, a depending rectangular frame 3, the front vertical bar of which extends some distance above the side-bars 1. An extension 2 of the bars 1 constitutes a platform for the drivers seat 4, and to the under side of said platform is located the front truck 5, which may be of any ordinary construction. Near their forward ends there rise from the side barsl vertical bars 6, and near their rear ends there are bolted to the side bars depending rectangular frames 7.

S designates the axle, at the rear end of the machine, and the same is mounted in boxes 9, located in vertical guides lO, supported by the stirru p or frame 7, and adapted for vertical movement. A bell-cranked lever 11 is pivoted as at 13 to the framework, and at its rear end is connected by a link 14 to the axle 8. The forward end of the lever is by a connecting rod 15, pivotally connected as at 16 to a hand-lever 17, pivoted at 1S to the platform 2, by which the axle may be adjusted vertically. The lever 17 carries a lockingpawl 19, designed to engage with the toothed sector 2O at any point of adjustment of said lever and the axle. The axle is also provided adjacent to each of the ground wheels with a pair of spocket-wheels 2l. In journals in the standards 6 is mounted for rotation a shaft 22, upon which opposite the sprockets 21 are mounted sprocket Wheels 23. The opposite pairs of sprocket wheels 2l and 23 are connected by crossed sprocket-belts or chains 24.

At intervals upon the shaft 22, between the sprocket wheels 23'are mounted large sprocket wheels 25, and upon shafts 26, journaled in boxes 27, movable in pairs of vertical guide-s 28 of the stirrup 7, are mounted sprocket-wheels 29, correspondingin number and location with the wheelsl 25,and being connected thereto by endless sprocket chains 30. The two wheels 29 are in the same vertical plane or may be adjusted to dierent elevations, and between them there is attached rigidly to the boxes 27 in any suitable manner, (not shown on account of intervening parts,) a iiat table 31, under which the endless sprocket chains 30 are designed to run, said table being provided with a series of small rollers 32. By raising and lowering the Wheels 29, the table is also raised and lowered, and in a manner as will be hereinafter made obvious the endless sweeping-belt may be made to travel closer to the surface upon which it is operating. The elevation of the Wheels 29 is secured by means of a pair of threaded rods 33, connected with the boxes 27.

To the series of chains 30 is secured a series of transverse cleats 34, and to some of them are secured steel wire brushes 35, while to others are secured steel Scrapers 36. In the present instance we employ a series of IOO four brushes to every scraper, though their relative numbers may be altered. In this instance, also, the scrapers are shown as S- shaped, though it will be understood thatA their forms may be changed.

To the side-bars l, slightly in front of the sprocket Wheels 23, there is pivoted as at 37 i an apron 38, the same being rearwardly inclined and supported by braces or suspension rods 39. The apron terminates close to the ground or adjacent to that point of the brushes that deviate from the ground, and is` there provided upon its under side with,

wheels 40.

vator 46, the latter shaft being provided with a sprocket wheel 47, which gears with and isg voperated by a sprocket wheel 48, connected? by a chain 49, located at the front side of the elevator casing.

The sprocket wheel 48 i'sA mounted at the front end of a shaft 50, which is located opposite a companion shaft 51,-the two 'supporting a horizontal endless carrier 52, lo-

cated directly -under the front end of the I brushes.

mounted for rotation a carrier 55,'operated;

Upon shafts 53 and 54 there ist` by means of a chain 56, passing 'over ai sprocket 57 on the end of the shaft 54, vand over a sprocket 58 on the'end of the shaft 59,1? which-shaft also carries a beveled-'gear 60, en- 1 gaging and driving a gear 6l on the rear endnk of shaft 50.

brushes and Scrapers are securely fastened? to opposite links ofthe endless 'sprocketchains, and secured tothe opposite ends and l to the undersides of each of these blocks isfv a pair of rearwardly disposed fiat bars 'or1 plates 61:, the rear ends of each 'pair of barsv taking under and resting atly against the,

next succeeding pair of bars or plates.

Byl

such construction it will be seen that thel blocks are prevented from turning when the; brushes and Scrapers are in contact with the'l ground.

vknockers 66, immediately over the endle'ss` carrier 52, against which the Scrapers and brushes successively come as they arrive atthat point; and by the same, mud 'and other refuse adhering thereto are knocked there` from andfall -upon the carrier 52. v A sprocket Q 67, is located upon the shaft 59, and receivest motion from the shaft 22 by means of a.- sprocket-chain 68,which passesoverasprocket 69 upon the shaft 22. cated at one side of and depends from the A receptacle 65 is lo-l elevator-casing 43, and may deliver the dirt collected in any suitable manner.

This completes the construction of the sweeper, and the operation may be briefly stated as folloWs:-The machine is first adjusted by the means specified, so as to press lightly or well down against the surface to be swept and scraped, after which it is ready for operation. Being set in motion either by steam or horse power, motion is transmitted from the rear ground Wheels to the axle 8, which latter is rotated and transmits motion to the sprockets 2l, which in turn through the medium of the chains 24 transmit motion to the upper shaft 22. This shaft operates'the series of sprockets 25 and moves the chains and consequently the sprockets 29. The dirt located between the rear end of the apron 38 and the rear end of the casing, is scraped and loosened 'by the brushes and Scrapers and vcarried by them up the apron', Where it is delivered over the front end of the samefupon the horizontal carrier 52, from thence it isfdelivered upon the intermediate carrier 55 and passes onto the carrier 4G, by which itis elevated and discharged over the upper end of the same in'to'a suitable receptacle 65, from Whichitissubseqnentlydelivered. Asprocket 67 is located upon theshaft 59 and receives motion from the shaft 22 by means vof a sprocket chain 68, which passes over a sprocket '69 upon the shaft 22.

It willbe seen that the'dri-ver has -full'control of the machine and from his "position upon his seat may raise and lower the brushes, pressing them with more yor less forceagainst Vthe surface of the street.

Having described our invention, what we claim iszl. In a street sweeping machinejthe comy bination 'with the framework, the upper and The blocks constitutingl the backs of thel v wheels mounted on the axle, a lever pivoted l; to the frame and provided with a locking In the casing 3 there is secured a series of@ means, a bell-crank mounted in the frame, a link connecting the same with the'boxes and a connecting rod between the'bell-crank lever and the first mentioned lever, substantially as specified.

3. In a'street-sweeper, thecombin'ation with a 'frame-work having bearings 9, vertically-'arranged front vand rear guides, and upper-bearings located beyond the said front guide, of an axle mounted inbearings 9 and carrying drivewheels, a shaft mounted in the upper bearings, sprocket-wheels mounted on the shafts, a brush-carrying belt connecting the same,

' driving mechanism between this axle and one of the shafts, and means for vertically adjusting the shaft-bearings which are mounted in the guides, substantially as described.

4. In a street sweeping machine, the combination With the framework having the upper bearings and the pairs of vertical guides, of boxes mounted in the guides, set screws for raising and lowering the same, shafts mounted in the boxes andin the upper bearings mounted on the shafts, means for driving the same, and brush-.carrying belts mounted on the sprocket Wheels, substantially as specified.

5. The combination with the endless chains, of the blocks secured to the opposite links thereof and provided with cleaning agents, and the bars 6l secured lo the ends of the blocks, each of the bars being rearwardly eX- tended and taking under the next succeeding bar, substantially as specified.

6. In a street sweeper, the Iiat table 3l, arranged directly over the point Where the sweeper comes in contact with the ground and provided with rollers 32, combined with the sprocket chains 30 arranged to run under the table against the rollers, and carrying the brushes, as set forth.

7. In a street sweeper, the chains 30 provided with transverse cleats 34, some of Which are provided With brushes 35, While the others are provided with curved steel scrapers 36,

arrangedbetween the brushes, and the fiat bars or plates 6l secured to the cleats and overlapping one another whereby the cleats are prevented from turning when the brushes and Scrapers are in contact with the ground, as set forth.

8. In a street-sweeper, the framework provided with the ground Wheels combined with the endless chains carrying the sweepers, supports therefor, the inclined apron hinged to the framework and over which apron the endless chain With its sweepers travels, and the braces or suspension-rods 39 39 for supporting the apron, and the Wheel 40 carried by the apron to run on the ground, as set forth.

9. In a street-sweeper, the combination with the sprocket-chains 30 arranged to run in operative relation with the'ground, of brushes carried by said chains, sprocket-Wheels for the chains, and adj ustng boxes for the shafts of the sprocket-wheels, substantially as described.

In testimony that we claim the foregoing as our own We have hereto affixed our signatures in presence of two Witnesses.

HALE E. HAWK. OLIVER W. JOHNSON. Witnesses:

M. J. MONNETH, R. V. SEARS. 

